// generates STXV instructions on
		// power9. The Short variation is used
		// if no loop is generated.

		// sizes >= 64 generate a loop as follows:

		// Set up loop counter in CTR, used by BC
		// XXLXOR clears VS32
		//       XXLXOR VS32,VS32,VS32
		//       MOVD len/64,REG_TMP
		//       MOVD REG_TMP,CTR
		//       loop:
		//       STXV VS32,0(R20)
		//       STXV VS32,16(R20)

	MOVBZ  ·useAsm(SB), R4
	LMG    dig+0(FP), R1, R3            // R2 = &p[0], R3 = len(p)
	MOVBZ  $2, R0                       // SHA-256 function code
	CMPBEQ R4, $0, generic

loop:
	KIMD R0, R2      // compute intermediate message digest (KIMD)
	BVS  loop        // continue if interrupted
	RET

generic:

	MOVBZ  ·useAsm(SB), R4
	LMG    dig+0(FP), R1, R3            // R2 = &p[0], R3 = len(p)
	MOVBZ  $3, R0                       // SHA-512 function code
	CMPBEQ R4, $0, generic

loop:
	KIMD R0, R2      // compute intermediate message digest (KIMD)
	BVS  loop        // continue if interrupted
	RET

generic:

    public void visitForLoop(ForStatement forLoop) {
        restrict(forLoop);
    }

    @Override
    public void visitWhileLoop(WhileStatement loop) {
        restrict(loop);
    }

    @Override
    public void visitDoWhileLoop(DoWhileStatement loop) {
        restrict(loop);
    }

    @Override
    public void visitIfElse(IfStatement ifElse) {
        restrict(ifElse);
    }

    @Override

func isOperationRunSerially(ch <-chan interface{}, quit chan<- interface{}) bool {
	defer close(quit)
	numOperationsStarted := 0
loop:
	for {
		select {
		case <-ch:
			numOperationsStarted++
			if numOperationsStarted > 1 {
				return false
			}
		case <-time.After(5 * time.Second):
			break loop
		}
	}
	return true
}

    TF_DeleteBuffer(buf);
    return def.DebugString();
  }

  TF_Status* s_;
  TF_Graph* graph_;
  std::vector<TF_Output> inputs_;   // The inputs to the while loop
  std::vector<TF_Output> outputs_;  // The final outputs of the while loop
  std::unique_ptr<TF_WhileParams> params_;
  std::unique_ptr<CSession> csession_;

 private:
  // Used to verify that errors don't change graph_

// RUN: tf-opt %s --tf-remove-unused-while-results --split-input-file | FileCheck %s

// Check that we remove the first result and operand from the loop because the
// result is unused and all other conditions are satisfied, that means:
// - the corresponding first block arguments are unused (except for `tf.OpB`
//   which is the defining op of the first result and will be pruned)
// - `tf.OpB` is not stateful

func signal_disable(uint32)
func signal_enable(uint32)
func signal_ignore(uint32)
func signal_ignored(uint32) bool
func signal_recv() uint32

func loop() {
	for {
		process(syscall.Signal(signal_recv()))
	}
}

func init() {
	watchSignalLoop = loop
}

const (
	numSig = 65 // max across all systems
)

func signum(sig os.Signal) int {
	switch sig := sig.(type) {
	case syscall.Signal:

	MOVD	x+8(FP), R2
	MOVD	y+16(FP), R3
	MOVD	$0, R4

// The main loop of this code operates on a block of 4 words every iteration
// performing [R4:R12:R11:R10:R9] = R4 + R3 * [R8:R7:R6:R5] + [R12:R11:R10:R9]
// where R4 is carried from the previous iteration, R8:R7:R6:R5 hold the next
// 4 words of x, R3 is y and R12:R11:R10:R9 are part of the result z.
loop:
	CBZ	R0, done

	LDP.P	16(R2), (R5, R6)
	LDP.P	16(R2), (R7, R8)

		// or the other of hp and hu as the loop proceeds.
		//
		// hp is live during most of the body of the loop. But it isn't live
		// at the very top of the loop, when we haven't checked i<n yet, and
		// it could point off the end of the backing store.
		// hu is live only at the very top and very bottom of the loop.
		// In particular, only when it cannot possibly be live across a call.
		//